Harrasment from parents, putting questions on wife's character.

My parents are keep harassing to my wife from very begining of my marriage and keep on going from last 6 years. Due to this I am not staying at my parents residents in Hometown. I am staying in Noida on rented property. My parents took all gifts and cash including jwellery received in marriage. Denied of giving any of this, even sold wife's jwellery intentionally. They didn't spend any money on my education, even though they asked me to send money from my income. I had given money to them for around 1 lac in beginning, but after that I stopped. Now I am asking to give me some money to pay my dues from bank in the form of loan, they denied of any support, and putting bad allegations on my wife's character. I want to take some legal action as I have given enough time to manage all things, but nothing improved, it's effecting my personal and professional life both. Please suggest possible action.